Elephant

 The elephant in the bestiary comes in two variants, a regular one and a mammoth, with the mammoth getting an additional two tusk attack to improve action economy and resistance to cold environs, over the elephant's already impressive grabbing trunk and tusk attacks.

It is common knowledge that the great mammoths of Ledenya plains "bury" their dead. What isn't common knowledge is that mammoth graveyard locations aren't randomly chosen - each of them actually lies on a confluence of ley lines. While humanoid graveyards tend to corrupt the ley lines, infusing them with necrotic energies, the lines passing through mammoth graveyards carry with them primal energies, responding to primitive but strong concepts of bond, survival, and family.

The Sourside jungle is deeply magical in nature, every speck of soil and every leaf on a tree containing residual magic. The amount of magic remaining in a corpse beyond its death responds to the amount of life force it held in life - and elephants, being among the largest denizens of the jungle, are often targeted to harvest it. Both the Hunters' Conglomerate, who offer heaps of blood money, and the Druidic circle opposing them, who offer nothing but a clean conscience, are looking for recruits in the struggle for power in the jungle.

A necromancer decided to usurp an elephant graveyard. He conducted a ritual to raise up an army of zombie elephants, but instead, what rose up is something that has never been seen before - a necrodont, an lumbering, skeletal elephantine creature that is made up of dozens of elephant skeletons. The necrodont promptly trampled the necromancer, before proceeding to go on a rampage in the surrounding countryside. Curiously, the creature never attacked a single animal, nor a druid who hadn't attacked it first - while humanoids were killed left and right. Attempting to combat the massive undead being is a last resort option, but sages suggest the graveyard might hold a key to laying it to rest without engaging it directly.